THE PIERIDS BB. Front wings without a black bar along the inner margin. C. Ground color of wings yellow. [E. eitterpe), p. 98. The Little Sulphur. CC. Ground color of wings orange. {E. nicippe), p. 97. The Sleepy Yellow.AA. Antennae gradually increasing in size toward the tip; the club ill-defined, slender, cylindrical, and terminating abruptly. B. The outer margin of the upper surface of the front wings distinctly bordered with a dark-brown or black band. C. Fore wings with a dog's-head figure. (Z. ccesonid), p. 90. The Dog's-head. CC. Fore wings without a dog's-head figure. D. Colors normally yellow. [E. philodice), i[>. g2. The Roadside Butterfly. DD. Colors normally orange. {E. eurytheme), p. 95. The Orange Sulphur. BB. The outer margin of the upper surface of the front wings not bordered with a brown or black band; some¬ times, however, there is a series of dark spots on the outer margin. C. Ground color of the upper surface of the wings canary-yellow. D. Outer margin of hind wings with a broad orange band. {C.philea), p. 87. The Red-barred Sulphur. DD. Hind wings without broad orange band. [C. eu- bule), p. 88. The Cloudless Sulphur. ' 85